adrift afloat alternating amorphous banal betwixt and between bland capricious changeable changeful dead desultory deviable dilute diluted dizzy dull eccentric enervated erratic fade fair fair to middling fairish fast and loose fickle fitful flat flavorless flickering flighty flitting fluctuating fowl freakish giddy gruelly halfhearted impetuous impulsive inane inconsistent inconstant indecisive indifferent infirm infirm of purpose infirm of will insipid irregular irresolute irresponsible jejune lackluster languid listless mazy mediocre medium mercurial middling mild milk-and-water milky moderate modest moody mushy namby-pamby neutral of a kind of a sort of sorts pantywaist pappy passable pulpy rambling respectable restless roving sapless savorless scatterbrained shapeless shifting shifty shuffling so-so spasmodic spiceless spineless spiritless stale tasteless tedious thin tolerable unaccountable uncertain uncontrolled undependable undisciplined unfixed unflavored unpredictable unreliable unrestrained unsavory unsettled unstable unstable as water unstaid unsteadfast unsteady vacillating vagrant vapid variable vicissitudinary vicissitudinous volatile wandering wanton washy watered watered-down waterish watery wavering wavery wavy wayward weak whimsical